U-Series 6.5" v.1 Subwoofer

$137.69 $169.99

  • RMS 400 watts
  • Dual 2 or 4 ohm voice coils
  • Optimized for small ported enclosures
  • Aluminum 1.75” voice coil former for superior heat dissipation
  • High-temperature copper voice coil
  • Double stitched surround
  • Heavy-duty cast basket
  • Spring-loaded terminals accept up to 8-gauge wire
  • Stitched-on heavy-duty tinsel leads
  • Solid pole with vent channels and aluminum shorting ring cap
  • Rear gap-venting
  • Top-Plate Cooling Channels

Perfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!

Specifications

RE (Ohms) 4.0586 6.6274
FS (Hz) 41.9533 38.6925
VAS (L) 2.9053 3.7701
Qes 0.5238 0.5005
Qms 8.5834 7.2470
Qts 0.4937 0.4681
Le (mH) 4.0112 5.5892
BL (NA) 16.7428 20.0082
Mms (Grams) 137.2546 124.3518
Cms (uM/N) 104.8528 136.0613
Sens (dB @ 1w/1m) 77.8706 78.1460
Xmax 19mm 19mm
T/S SPECS U-6.5SW" D2 U-6.5SW" D4
   

Enclosure Specifications

  • Ported Enclosure
    • Size: .25-.35 cu. ft. net
    • Port Area: 4-5 sq. in.
    • Port Tuning: 35hz -40hz
  • Sealed Enclosure
    • Size: 0.125-0.2 cu. ft. net
    • Displacement:  .04 cu. ft. 
  • Depth:  5.71"
  • Outside Diameter: 7.17"
  • Cutout: 5.94"

Physical Dimensions